#181D4E#181D4E

#181D4E is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.9% C 0.089 H 274.0°. Best body text is #FFFFFF at 15.85:1 contrast (WCAG AA passes).

Color values

HEX	#181D4E
RGB	rgb(24, 29, 78)
HSL	hsl(234, 53%, 20%)
HSV	hsv(234, 69%, 31%)
CMYK	cmyk(69.2%, 62.8%, 0%, 69.4%)
CIE-LAB	lab(13.37, 15.71, -31.00)
CIE-LCH	lch(13.37, 34.75, 296.87°)
OKLab	oklab(25.94% 0.0062 -0.0891)
OKLCH	oklch(25.94% 0.089 274)
XYZ	xyz(2.1907, 1.6228, 7.4040)
Luminance	0.0162 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181D4E #4E4918

analogous

#18384E #181D4E #2E184E

triadic

#181D4E #4E181D #1D4E18

tetradic

#181D4E #4E1838 #4E4918 #184E2E

square

#181D4E #4E1838 #4E4918 #184E2E

split-complementary

#181D4E #4E2E18 #384E18

monochromatic

#070917 #0A0C1F #181D4E #262E7D #3540AC

Accessibility & contrast

On white

15.85

#181D4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#181D4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181D4E

15.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181D4E	#FFFFFF	#000000	##FFFFFF
##181D4E	1.00	15.85	1.32	15.85
#FFFFFF	15.85	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002550

Deuteranopia (green-blind)

#00204D

Tritanopia (blue-blind)

#002932

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #181d4e;
/* rgb */ color: rgb(24, 29, 78);
/* oklch */ color: oklch(25.9% 0.089 274.0);

Tailwind

colors: {
  custom: {
    50: '#5c5880',
    500: '#181d4e',
    950: '#000000',
  },
}

SCSS

$custom: #181d4e;
$custom-light: #5c5880;
$custom-dark: #000000;

JSON

{
  "hex": "#181d4e",
  "rgb": {
    "r": 24,
    "g": 29,
    "b": 78
  },
  "hsl": {
    "h": 234.444,
    "s": 52.941,
    "l": 20
  },
  "oklch": {
    "l": 0.25935,
    "c": 0.08933,
    "h": 274
  },
  "luminance": 0.01623
}

Semantic roles & 50–950 ramp

primary

#181D4E

secondary

#857E3D

accent

#CF4BDC

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #181D4E

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →